Drinking Water Systems in Sumas, Washington
2 water systems are reported for this city, with a combined service population of 2,769. The systems have 1 EPA violation record in the five-year period ending June 30, 2026.
Water Systems Serving Sumas
SUMAS WATER DEPT
2,157 served38 historical records
A
SUMAS RURAL WATER ASSOCIATION
612 served23 historical records1 recent
B
EPA Contaminant Categories in Historical Violation Records
Coliform (TCR)19 records
Nitrate6 records
Arsenic3 records
Fluoride3 records
Selenium3 records
Thallium3 records
Cadmium3 records
Barium3 records
Chromium3 records
Diquat2 records
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.